NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

HOME

Re : A noon sight conundrum
From: Zorbec Legras
Date: 2003 Nov 24, 13:30 -0500

----- Original Message -----
From: "Noyce, Bill" 
Date:         Mon, 24 Nov 2003 10:28:13 -0500
To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM
Subject:      Re: FW: A noon sight conundrum


> Since the sun's declination is
> usually changing slowly
> This effect is too small to have any practical effect on finding
> longitude, as far as I know, but the similar effect that arises
> when you observe from a vessel travling north or south needs to
> be taken into account.
>         -- Bill


There is a formula to correct the problem of observing the sun by a mouving observer:
T0 = ((T 1 + T2) /2) + correction
correction = 15,28 * ( motion in Lat  - motion in dec )*(tan Lat 1 - tan dec 1)

But for some, it is may be not logic enought...
--
___________________________________________________________
Sign-up for Ads Free at Mail.com
http://promo.mail.com/adsfreejump.htm

Subject:
Author:
Start date:	(yyyymm dd)
End date:	(yyyymm dd)

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

NavList

What is NavList?

Get a NavList ID Code

Retrieve a NavList ID Code

Email Settings

Custom Index

Add Images & Files
Name or NavList Code:	Email:

Name:
	(please, no nicknames or handles)
Email:

NavList ID Code: